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Use context for more functions

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Star Brilliant
2018-11-07 19:25:46 +08:00
parent 95ec839409
commit c51be0e69c
6 changed files with 28 additions and 24 deletions
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doh-server/google.go
+3 -2
View File
@@ -24,6 +24,7 @@
package main
import (
"context"
"encoding/json"
"fmt"
"log"
@@ -38,7 +39,7 @@ import (
"golang.org/x/net/idna"
)
func (s *Server) parseRequestGoogle(w http.ResponseWriter, r *http.Request) *DNSRequest {
func (s *Server) parseRequestGoogle(ctx context.Context, w http.ResponseWriter, r *http.Request) *DNSRequest {
name := r.FormValue("name")
if name == "" {
return &DNSRequest{
@@ -168,7 +169,7 @@ func (s *Server) parseRequestGoogle(w http.ResponseWriter, r *http.Request) *DNS
}
}
func (s *Server) generateResponseGoogle(w http.ResponseWriter, r *http.Request, req *DNSRequest) {
func (s *Server) generateResponseGoogle(ctx context.Context, w http.ResponseWriter, r *http.Request, req *DNSRequest) {
respJSON := jsonDNS.Marshal(req.response)
respStr, err := json.Marshal(respJSON)
if err != nil {
doh-server/ietf.go
+3 -2
View File
@@ -25,6 +25,7 @@ package main
import (
"bytes"
"context"
"encoding/base64"
"fmt"
"io/ioutil"
@@ -38,7 +39,7 @@ import (
"github.com/miekg/dns"
)
func (s *Server) parseRequestIETF(w http.ResponseWriter, r *http.Request) *DNSRequest {
func (s *Server) parseRequestIETF(ctx context.Context, w http.ResponseWriter, r *http.Request) *DNSRequest {
requestBase64 := r.FormValue("dns")
requestBinary, err := base64.RawURLEncoding.DecodeString(requestBase64)
if err != nil {
@@ -145,7 +146,7 @@ func (s *Server) parseRequestIETF(w http.ResponseWriter, r *http.Request) *DNSRe
}
}
func (s *Server) generateResponseIETF(w http.ResponseWriter, r *http.Request, req *DNSRequest) {
func (s *Server) generateResponseIETF(ctx context.Context, w http.ResponseWriter, r *http.Request, req *DNSRequest) {
respJSON := jsonDNS.Marshal(req.response)
req.response.Id = req.transactionID
respBytes, err := req.response.Pack()
doh-server/server.go
+11 -7
View File
@@ -24,6 +24,7 @@
package main
import (
"context"
"fmt"
"log"
"math/rand"
@@ -105,6 +106,8 @@ func (s *Server) Start() error {
}
func (s *Server) handlerFunc(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
w.Header().Set("Server", USER_AGENT)
w.Header().Set("X-Powered-By", USER_AGENT)
@@ -158,11 +161,11 @@ func (s *Server) handlerFunc(w http.ResponseWriter, r *http.Request) {
var req *DNSRequest
if contentType == "application/dns-json" {
req = s.parseRequestGoogle(w, r)
req = s.parseRequestGoogle(ctx, w, r)
} else if contentType == "application/dns-message" {
req = s.parseRequestIETF(w, r)
req = s.parseRequestIETF(ctx, w, r)
} else if contentType == "application/dns-udpwireformat" {
req = s.parseRequestIETF(w, r)
req = s.parseRequestIETF(ctx, w, r)
} else {
jsonDNS.FormatError(w, fmt.Sprintf("Invalid argument value: \"ct\" = %q", contentType), 415)
return
@@ -178,16 +181,16 @@ func (s *Server) handlerFunc(w http.ResponseWriter, r *http.Request) {
req = s.patchRootRD(req)
var err error
req, err = s.doDNSQuery(req)
req, err = s.doDNSQuery(ctx, req)
if err != nil {
jsonDNS.FormatError(w, fmt.Sprintf("DNS query failure (%s)", err.Error()), 503)
return
}
if responseType == "application/json" {
s.generateResponseGoogle(w, r, req)
s.generateResponseGoogle(ctx, w, r, req)
} else if responseType == "application/dns-message" {
s.generateResponseIETF(w, r, req)
s.generateResponseIETF(ctx, w, r, req)
} else {
panic("Unknown response Content-Type")
}
@@ -232,7 +235,8 @@ func (s *Server) patchRootRD(req *DNSRequest) *DNSRequest {
return req
}
func (s *Server) doDNSQuery(req *DNSRequest) (resp *DNSRequest, err error) {
func (s *Server) doDNSQuery(ctx context.Context, req *DNSRequest) (resp *DNSRequest, err error) {
// TODO(m13253): Make ctx work. Waiting for a patch for ExchangeContext from miekg/dns.
numServers := len(s.conf.Upstream)
for i := uint(0); i < s.conf.Tries; i++ {
req.currentUpstream = s.conf.Upstream[rand.Intn(numServers)]